MediaPicker.mm

@interface MediaPicker()
@property (nonatomic, retain) MPMediaPickerController *picker;
@end
 
@implementation PYSMediaPicker 

@synthesize picker;
@synthesize delegate;
 
- (void)dealloc
{
    [picker release];
    [super dealloc];
}
 
- (void)presentPicker
{
    self.picker =
            [[[MPMediaPickerController alloc]
                    initWithMediaTypes: MPMediaTypeAnyAudio] autorelease];
    [picker setDelegate:self];
    [picker setAllowsPickingMultipleItems:NO];
    picker.prompt = @"Choose sound to process";
 
    [self.delegate.navigationController pushViewController:self.picker animated:YES];
}
 
- (void)removePicker
{
    [self.delegate.navigationController popViewControllerAnimated:NO];
    self.picker = nil;
}
 
- (void)mediaPicker:(MPMediaPickerController *)mediaPicker didPickMediaItems:(MPMediaItemCollection *)mediaItemCollection
{
    [self.delegate pickerDidPickMediaItem:mediaItemCollection];
    self.picker.delegate = nil;
}
 
- (void)mediaPickerDidCancel:(MPMediaPickerController *)mediaPicker
{
    [self.delegate pickerDidCancel];
    self.picker.delegate = nil;
}
 
 
@end

MediaPickerDelegate.mm

@protocol MediaPickerDelegate;
 
@interface MediaPicker : NSObject<MPMediaPickerControllerDelegate>
 
@property (nonatomic, assign) id<MediaPickerDelegate> delegate;
 
- (void)presentPicker;
- (void)removePicker;
 
@end
 
 
@protocol MediaPickerDelegate
 
- (void)pickerDidPickMediaItem:(MPMediaItemCollection *)mediaItemCollection;
- (void)pickerDidCancel;
- (UINavigationController *)navigationController;
 
@end